Abji daeoovala



No. 617,229. Patented Ian. 3, "899. M. D. DAROUVALA.

GRID FOR COTTUN GINS.

(Application filed Hair. 2, 1898.) (No Model.)

FIG.1

TE'IGZ.

WITNESSES: INVENTOR BY 1 C-% %Mh A TZ'OHNE rs.

rrnn firth MANCIIERSHAH DORABJI DAROOVALA, OF BOMBAY, INDIA, ASSIGNOR TO RALLI BROTHERS, OF SAME PLACE.

GRID FOR COTTON-ems.

SPECIFICATION forming part of Letters Patent 210,617,229, dated January 3, 1899.

Application filed March 2,1898. Serial No. 672,259. (No model.)

To all whom it may concern.-

Be it known that I, MANCHERSHAH Don- ABJI DAROOVALA, a British subject, and a resident of Bombay, India, have invented a new and Improved Grid for Ootton-Gins, of which the following is a full, clear,- and exact description.

This invention relates to grids for cotton gins.

In the present gins used in India the fingers of the fixed or bottom grids are merely plain fingers attached to a base-plate, and the outer ends of the fingers are in no way secured from movement transversely or otherwise. The consequence is that during the operation of ginning small stones or other obstructions very often bend the fingers, destroying the equal spaces between them. It is of much importance that the spaces between the gridfingers be of a fixed size. Otherwise some of the cotton-seed instead of being ginned will pass through an enlarged space and be lost.

The object of my invention is to provide a simple means to prevent the lateral spreading of the grid-fingers, thus saving considerable cotton that would otherwise be lost, as above stated.

I will describe a grid embodying my invention, and then point out the novel features in the appended claims.

Reference is to be had to the accompanying drawings, forming a part of this specification, in which similar characters of reference indicate corresponding parts in all the views.

Figure 1 is a sectional elevation of a portion of a cotton-gin, showing my improved grid as applied thereto. Fig. 2 is a rear elevation, and Fig. 3 is a plan, of the grid.

Referring to the drawings, 1 designates the gin-roller, having the usual leather strips 2 to catch and carry the cotton fiber. At one side of the roller is the usual fixed blade 3 and reciprocating blade 4:- Rearward of the fixed blade is the fixed grid, consisting of a plate 5, horizontally-disposed fingers 6, and downwardly-extended arms 7. The ends of the several fingers 6 are connected together by a strap 8, which may be integral with the fingers or otherwise secured thereto.

It is well understood that coacting with the lower or fixed grid of a cotton-gin is an upper grid mounted to swing its teeth between the teeth of the lower grid, and this upper grid is adjustable relatively to the lower grid. This upper grid is indicated by 8 in the drawings. It is also well understood that cotton-seed produced toward the end of the ginning season are considerably smaller than are the seed pro duced or ginned during other portions of the season. As shown in the drawings, the rearward surface of the strap 8, or that surface facing uppermost, is inclined downward and rearward. This form is given to the strap so that a slight difference between the points of the moving grid-fingers and' the incline of the strap may be obtained by adjusting the moving grid relatively to the fixed grid, so that small seed may be caught and kept hopping on the strap until the roller takes the lint. It will be observed that this means of correcting the end spaces by the slope of the strap when moved radially is entirely new, and it is found in practice to be of great benefit, because the size of the seed varies consid erably, and when no means exists for readily altering the spaces at the ends of moving grids, as in the ordinary gins, small seeds pass through and are lost, because a space that will suit large seed is too big for the smaller seed. This inclined strap at the end of a ginning season, when the seeds are small, is given a slight set in the radial action of the grid. This contracts the space at the corner of the new strap, and thus stops any tendency to pass small seed until the roller takes the lint. The incline of the strap also serves to keep the small seed in a hop ping motion in front of the roller until the roller grips the lint, whereas in gins .as at present constructed if the roller misses the lint it is at once thrown down and lost among the seed.

Having thus described my invention, I claim as new and desire to secure by Letters Patent-- 1. In a cotton-gin, a fixed grid having a strap rigidly connected to the outer end of its fingers, the top of said strap being inclined downward and rearward, and a movable grid cooperating with the fixed grid.

2. In a cotton-gin, a movable grid, a fixed grid, and a strap connecting the outer end of the fixed-grid fingers, the said strap having one of its surfaces transversely inclined.

MANOHERSHAH DORABJI DAROOVALA.

Witnesses:

DADAP SITAIUM KOTHAR, HARISCHANDRA SADASHIA NAYAK. 

